Outlines of astronomy |
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Page xxiii
... figure of the Earth and other planets on the motions of their satellites . Of the tides . Masses of disturbing bodies deducible from the perturbations they produce . Mass of the Moon , and of Jupiter's satellites , how ascertained ...
... figure of the Earth and other planets on the motions of their satellites . Of the tides . Masses of disturbing bodies deducible from the perturbations they produce . Mass of the Moon , and of Jupiter's satellites , how ascertained ...
Page 16
... figure of the earth ; —the hills , trees , and other objects which roughen its surface , and break and elevate the line of the horizon , though obviously bearing a most minute proportion to the whole earth , are yet too considerable ...
... figure of the earth ; —the hills , trees , and other objects which roughen its surface , and break and elevate the line of the horizon , though obviously bearing a most minute proportion to the whole earth , are yet too considerable ...
Page 17
... figures . If we ascend a high eminence on a plain ( for instance , one of the Egyptian pyramids ) , the same holds ... figure of a body which , however seen , appears always circular , can be no other than a sphere or globe . ( 22. ) A ...
... figures . If we ascend a high eminence on a plain ( for instance , one of the Egyptian pyramids ) , the same holds ... figure of a body which , however seen , appears always circular , can be no other than a sphere or globe . ( 22. ) A ...
Page 22
... figure C Db B , we know Db , the length of the arch of the circle between D and b , - viz . half the measured interval , and b B , the excess of its secant above its radius which is the height of B , - data which , by the solution of an ...
... figure C Db B , we know Db , the length of the arch of the circle between D and b , - viz . half the measured interval , and b B , the excess of its secant above its radius which is the height of B , - data which , by the solution of an ...
Page 27
... figure than the inequalities at the bottom of the sea interfere with the general sphericity of its surface . They would exer- cise absolutely none were it not for their effect in giving another than horizontal direction to the currents ...
... figure than the inequalities at the bottom of the sea interfere with the general sphericity of its surface . They would exer- cise absolutely none were it not for their effect in giving another than horizontal direction to the currents ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Julian period Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena planet planetary pole portion position precession proper motions proportion recede reckoned refraction remarkable respect result revolution revolving right ascension rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole zenith